/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.orc.vector;

import org.apache.flink.table.data.TimestampData;

import org.apache.hadoop.hive.ql.exec.vector.ColumnVector;
import org.apache.hadoop.hive.ql.exec.vector.TimestampColumnVector;

import java.sql.Timestamp;
import java.time.LocalDateTime;

/**
 * This column vector is used to adapt hive's TimestampColumnVector to Flink's
 * TimestampColumnVector.
 */
public class OrcTimestampColumnVector extends AbstractOrcColumnVector
        implements org.apache.flink.table.data.columnar.vector.TimestampColumnVector {

    private TimestampColumnVector vector;

    public OrcTimestampColumnVector(ColumnVector vector) {
        super(vector);
        this.vector = (TimestampColumnVector) vector;
    }

    @Override
    public TimestampData getTimestamp(int i, int precision) {
        int index = vector.isRepeating ? 0 : i;
        Timestamp timestamp = new Timestamp(vector.time[index]);
        timestamp.setNanos(vector.nanos[index]);
        return TimestampData.fromTimestamp(timestamp);
    }

    public static ColumnVector createFromConstant(int batchSize, Object value) {
        TimestampColumnVector res = new TimestampColumnVector(batchSize);
        if (value == null) {
            res.noNulls = false;
            res.isNull[0] = true;
            res.isRepeating = true;
        } else {
            Timestamp timestamp =
                    value instanceof LocalDateTime
                            ? Timestamp.valueOf((LocalDateTime) value)
                            : (Timestamp) value;
            res.fill(timestamp);
            res.isNull[0] = false;
        }
        return res;
    }
}
